Security key
12529R107
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 5,167,838
- Total 13F value
- $24,133,802
- Share change
- +644,705
- SEC-reported price per share
- $4.67
- Number of holders
- 23
- Value change
- +$3,486,701
- Number of buys
- 16
- Number of sells
- 5
- Shares outstanding
- 111,288,493
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
23
Top holders
10
CCCC full security history
Ownership snapshot
Full 13F holder table
C4 Therapeutics, Inc. SEC filings
C4 Therapeutics, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of CCCC - C4 Therapeutics, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Soleus Capital Master Fun...
Disclosed value leader
Sirenia Capital Managemen...
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 10%
13D/G row: Soleus Capital Master Fund, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Soleus Capital Master Fund, L.P. leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Soleus Capital Master Fund, L.P.'s linked filing trail.
Comparable ownership
Top 5
Soleus Capital Master Fund, L.P.
10%
Sirenia Capital Management LP
9.9%
RA CAPITAL MANAGEMENT, L.P.
9.9%
MORGAN STANLEY
9.3%
Lynx1 Capital Management LP
7.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Soleus Capital Master Fund, L.P. |
13D/G
|
10%
|
$19,791,153
10,361,860 shares
|
$0 | 31 Dec 2025 |
| Sirenia Capital Management LP |
13D/G
|
9.9%
|
$59,702,700
23,505,000 shares
|
$0 | 31 Mar 2026 |
| RA CAPITAL MANAGEMENT, L.P. |
13F
13D/G
Company
|
9.9%
from 13D/G
|
$21,040,000
8,000,000 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
13D/G
Company
|
9.3%
from 13D/G
|
$23,860,411
9,072,400 shares
|
— | 31 Mar 2026 |
| Lynx1 Capital Management LP |
13F
13D/G
Company
|
7.3%
from 13D/G
|
$18,407,112
6,998,902 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.9%
|
$35,860,491
7,678,906 shares
|
+$27,657,108 | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
23
Shares
5,167,838
Rows available
23
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
122
Q2 2026 holders
23
Holder diff
-99
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|